Ivan Pavlov, Russian physiologist

Ivan Pavlov, Russian physiologist

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Credit: SPUTNIK/SCIENCE PHOTO LIBRARY

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Caption: Ivan Pavlov (1849-1936), Russian physiologist. Pavlov is seated, surrounded by his assistants (left to right) O. S. Rosenthal, M. K. Petrova and V. K. Fyodorov. Pavlov quit training for the priesthood to study natural science in St Petersburg. His experiments in 1889 on the mechanism of digestion in dogs established the role of the autonomic nervous system and won him a Nobel prize in 1904. He is best remembered for subsequent work on conditioned reflexes - conditioning a dog to salivate in anticipation of food by ringing a bell each meal time. Eventually, the bell alone provoked salivation. These experiments founded behaviourist psychology. Photographed in 1933.

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